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Tytthostonyx : ウィキペディア英語版 | Tytthostonyx
''Tytthostonyx'' is a genus of prehistoric seabird. Found in the much-debated Hornerstown Formation which straddles the Cretaceous–Paleogene boundary 66 million years ago, this animal was apparently closely related to the ancestor of some modern birds, such as Procellariiformes and/or "Pelecaniformes". A single species is placed herein, ''Tytthostonyx glauconiticus''.〔Olsen, S. and Parris, D.C. (1987). "(The Cretaceous Birds of New Jersey. )" ''Smithsonian Contributions to Paleontology'', 63: 22pp.〕 It has been placed into a family of its own, Tytthostonygidae.〔 ==References==
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